Comment on Moon Landing Hoax Proof by jfb.
Some futher googling indicates that the original Saturn V plans are stored at MSFC in Huntsville, AL (which would make sense); however, the source I found isn’t authoritative (it’s a forum discussion with no links), so don’t take that as gospel.
What is true is that all the tooling and equipment required to build the Saturn V was destroyed after the Apollo program was canceled.
Not that we’re ever going to build it again; not only is there no tooling, it used components and electronics that are no longer manufactured anywhere. NASA’s new heavy lifter will use some legacy Shuttle technology (the SSMEs, the SRBs, etc.), but the electronics and guidance equipment will be fairly current.